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磷酸鹽溶液原位合成羥基磷灰石中空微球
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上海市科委“創(chuàng)新行動計劃”基礎(chǔ)研究重點項目(08JC1419200)


Phosphate Solution in Situ Synthesis of Hollow Hydroxyapatite Microspheres
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    摘要:

    利用鋰鈣硼玻璃在磷酸鹽溶液中的原位轉(zhuǎn)化反應(yīng)制備表面多孔的中空羥基磷灰石(HAP)微球。通過掃描電鏡(SEM)、電子能譜(SEM-EDS)、X射線衍射(XRD)儀、和紅外光譜(FTIR)儀分析微球的形貌和物相，研究與探討中空HAP微球的形成與轉(zhuǎn)化機制。結(jié)果表明：所制備的微球具有良好的中空結(jié)構(gòu)；中空微球物相為包含B型碳酸根的缺鈣羥基磷灰石，具有仿生性。600 ℃熱處理后，微球球殼完全由包含碳酸根的缺鈣羥基磷灰石晶體組成，并顯示出一定的機械強度。在磷酸鹽溶液中，鋰鈣硼玻璃表面原位生成Ca-P-OH水化物，并在玻璃表面原來Ca2+的位置沉積下來，形成微球殼，而由Li+和B3+占據(jù)的位置，因其溶出形成孔隙。這樣的結(jié)構(gòu)將有利于制備表面多孔的中空羥基磷灰石多孔貯庫型藥物釋放系統(tǒng)的載體

    Abstract:

    Hollow hydroxyapatite (HAP) microspheres with pores on their surfaces were prepared by in situ conversion reaction of Li-Ca-B glass in phosphate solution. The morphology and phase composition of the microspheres were investigated using SEM, SEM-EDS, XRD and FTIR. The formation and conversion mechanism of the hollow HAP microspheres during the immersion process was studied. The results show that the prepared microspheres possess good hollow structures. The phase of the microspheres is calcium-deficient hydroxyapatite containing B-type CO32-, which is biomimetic. After 600 oC heat treatment, hollow microspheres’ shells are completely composed of calcium-deficient hydroxyapatite containing CO32- and exhibit the necessary mechanical strength. In the phosphate solution, Ca-P-OH hydrate is in-situ formed on the surface of the Li-Ca-B glass and precipitates at the positions occupied by Ca2+ to form microsphere shell, while the pores are formed at the positions occupied by Li+ and B3+. Such structures are good for the preparation of hollow HAP as the carriers of the porous reservoir drug release system

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王迎春,黃文旵,姚愛華,王德平,周 筠,王 青.磷酸鹽溶液原位合成羥基磷灰石中空微球[J].稀有金屬材料與工程,2011,40(5):930~934.[Wang Yingchun, Huang Wenhai, Yao Aihua, Wang Deping, Zhou Jun, Wang Qing. Phosphate Solution in Situ Synthesis of Hollow Hydroxyapatite Microspheres[J]. Rare Metal Materials and Engineering,2011,40(5):930~934.]
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  • 收稿日期:2010-05-12
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